Main game screen
Starting the game, firing in random directions.
Fly over this platform to refuel (as shown in the meter at the bottom of the screen).
Upon flying over an ammo platform, you can select the type of ammo you'd like to equip.
Attacking a rig with ammo platforms nearby to keep you stocked.
Regular boats... a health meter shows their status.
It's getting crowded with these submarines.
A "Low on fuel" message flashes, time to find a refill.
High score screen